Sorry you've had to deal with these new symptoms after your cervical epidural. Not a diagnosis I would wish on anyone, but you might want to check out the Thoracic Outlet Syndrome forum. It has a ton of good information on cervico-brachial pain (including parasthesia), muscle atrophy and imbalance as well as excellent resources re top docs, PT's and other specialists in this area.

I suffered severe neck pain as my primary symptom for decades, along with shoulder/arm pain and weakness, hand atrophy, numbness and tingling in the fingers and other delightful stuff. Was misdiagnosed over and over and over again until I finally consulted a vascular surgeon - who diagnosed me on the spot with a very progressed case of neurogenic TOS.

When you do go for a second opinion you're going to want to be able to recount exactly where (i.e., along which nerve pathways) your upper extremity symptoms are occurring, what part/s of the arm and precisely which fingers are affected, etc.

It's also going to be important for you to find the right kind of PT for brachial plexopathy, and the TOS forum can help you with that as well. Use the search forum function to find threads on different topics which relate to the questions you have. The stickies at the top of the board are rife with good info! And if you'd like you can re-post your thread/s to see what kind of a response you get. You might be surprised.

I think it's great news that the epidural does seem to have helped your neck pain. Whether that result conclusively points to your cervical spine having an issue at C-7 I don't know (did they go in @ the level of C-6/C-7, or @ C-7/C-8?). And I'm not a doc, but I know that trouble with the C-8/T-1 nerve root is the hallmark of a lower trunk injury to the brachial plexus.

Hopefully, the source of your neck problem is indeed the spine and not compression of the neurovascular bundle comprising the brachial plexus. (I say that because, as miserable as cervical syndromes are - they are way easier to treat than neurogenic TOS.)

Best of luck to you and I hope that your symptoms resolve soon.